Anatomical articulating-grinder.



H. MANNON, H. M. BROWN & R. G PERKINS.

ANATOMICAL ARTICULATING GRINDER. APPLICATION FILED MAR. 7. 1917 1,232,355. Patented July 3, 1917.

4 SHEETSSHEET 1- auuamtozd H. IVIANNON, H. M. BROWN & R. G. PERKINS.

ANATOMICAL ARTICULATING GRINDER.

APPLICATION FILED MAR-7.1917.

1 232,3:35. Patented July 3, 1917.

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flflmkoiz, ammtw wanna, 1% fl lg ggz ig attache H. MANNON, H. M. BROWN 6: R. G. PERKINS. ANATONIICAL ARTICULATING GRINDER.

APPLICATION FILED MAR-7.1917.

1232,8555. I Patented July 3, 1917.

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H. MANNON, H. M. BROWN & R. G. PERKINS.

ANATOMICAL ARTICULATING GRINDER.

APPLICATION FILED MAR. 7. 1917.

1,232,355. Pate1 1-c 1g g 1 917.

w \t N V\\ a HOMER MANNON, HERMAN M. BROWN, AND ROBERT G. PERKINS,'OF HUNTINGTON,

WEST VIRGINIA.

ANATOMICAL ARTICULATIN'G-GRINDEB.

specification of Letters Patent;

Patented July a, ieiv.

Application filed march 7, 1917. serial no. 153,130.

To all whom it mag concern:

Be it lmown t at we, HOMER MANNON, HERMAN M. BROWN, and ROBERT G. PER- KINS, citizens of the United States, residing at Huntin ton in the county of Cabell, State of West irginia, have invented a new and useful Anatomical ArticulatingGrinder, of which the following is a specification.

It is the object of this invention to provide a machine for grinding dentures, so constructed that the movement of the lower 'aw will be simulated closely, novel means eing provided for adjusting the throw or lateral movement of the carrier which supports the lower denture, novel means being provided whereby a yielding pressure between the carriers which support the upper and lower dentures will be brought about, novel means being provided for actuating the lower denture carrier, and means being provided whereby the upper denture carrier may be moved readily, to permit an inspection of the work.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in view which will appear as the description proceeds, the invention residesin the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that mately on the line 44 of Fig. 2;

Fig. 5 is a longitudinal section taken approximately on the line 5-5 of Fig. 2; and

Figs. 6 and 7 are sections taken, respectively, on the lines 66 and 7--7 of Fig. 1. The grinder forming the subject matter of this application includes a supporting structure comprising a base 1. Disposed above the base 1 are any number of posts 2,

present four posts being employed in the present instance. By means of ball and socket joints 3, the lower ends of the posts are connected with the base 1, ball and socket joints 4 bemg employed for connecting the upper ends of the posts 2 with a table 5 which constitutes a carrier for the lower denture. At its periphery, the table 5 may be supplied with a dependlng ear 6 connected by means of a ball and socket joint 7 with a pitman 8 united through the instrumentality of a ball and socket joint 9 with a nut 10 into which a screw 11 is threaded, the screw being held against longitudinal movement, but for rotation, in the projecting arms 12 of a frame 14. Preferably a nut 15 is threaded onto the lower end 0 the screw 11, and the upper end of the screw is provided with a turning head 16, these elements cooperating with the arms 12 of the frame 14 to prevent the screw from moving endwise.

A pin 17 or other suitable securing means unites the frame 14 with a horizontal main shaft 18 journaled in a bearing 19 formed at. the upper end of a standard 20 which projects upwardly from the base 1. The

main shaft 18 is terminally provided with a pulley 21 held in place on the main shaft by a securing element 22. The pulley 21 may be provided I with a grooved tread 23, in order that it may be power-actuated. The pulley 21 is supplied with a crank 24, to the end that the pulley may be driven by hand,

if desired. A beveled pinion 25 is mounted on the main shaft 18, the hub 26 of the beveled pinion being attached to the shaft 18 by means of a securing element 27. The frame 14 and the hub 26 coact with the respective ends of the bearing 19, and thus the main shaft 18 is prevented from moving endwise.

A beveled pinion 28 meshes into the beveled Pinion 25 and includes a hub 29 secured to an auxiliary shaft 30 disposed at right angles to the main shaft 18. The auxiliary shaft 30 is journaled in a bearing 31 formed at the upper end of a standard 32 carried by the base 1. A frame 33, like the frame 14, is attached to the auxiliary shaft 30, the frame 33 and the hub 29 of the pinion 28 cooperating with the ends of the bearing 31 to prevent a longitudinal movement of the auxiliary shaft 30. The ends 34 of the frame 33 carry, against longitudinal movement, but for rotation, a screw 35 having a turning head 36, and carrying a nut '37, as

hereinbefore described. By means of a ball and socket joint 38, the nut 37 is'connected with one end of the pitman 39 united by means of a ball and socket joint 40 with an car 41 on the table 5, the pitman 39 being disposed at right angles to the pitman 8. The table 5 carries a seat 42, in which is located a ring 43. This ring is adapted to receive the lower denture.

A bracket 44 upstands from the base 1 at one end thereof and is provided with cars 48 carrying a cross pin 55 on which an arm 46 is mounted to swing vertically, the arm 46 having an eye 47 which surrounds the pin, the eye being located between the ears 48. F or a purpose which will be set forth hereinafter, one of the ears 48 is supplied with an upstanding lug 49. is threaded into a wing 51 projecting from the bracket 44, the set screw 50 engaging the lower face of the arm 46. The upper surface of the arm 46 is engaged by a set screw 52 carried by a bar 53 mounted to swing horizontally on a stud 54 carried by the bracket 44, there being a nut 55 on the stud, holding the bar 53 in place for horizontal swinging movement. The arm 46 has a broadened end 56 in which are mounted spring tongues 57, yieldable in a vertical direction, but practically rigid, so far as horizontal movement is concerned. Screws 58 or the like secure the spring tongues 57 to the part 56. The bar 53 has a broadened end 59 in which are mounted adjusting screws 60 which bear on the spring tongues 57. By means of screws 61 or the like, the spring tongues 57 are attached to a carrier 62 having set screws 63 retaining a ring 64, in which the upper den-- ture is mounted.

Fixed to and rising from the base 1 is a post 65 carrying a fixed pointer 66 adapted to coiiperate with a mark 71 on the table 5. In the'upper end of the post 65 is mounted a stem 67 carrying a'vertically adjustable pointer 68, held in place by a set screw 69, the stem 67 having a groove 70, receiving the inner end of the set screw, the construction being such that although the movable pointer 68 may be adjusted vertically, said pointer cannot be swung horizontally,

unless the inner end of the set screw 69 is backed out of the groove 70.

In practical operation, the lower denture is placed in the ring 43, and is held therein by cement or in any other suitable way. The upper denture is placed in the ring 64 and is held therein in a similar manner,

screws 63.

the ring 64 being introduced into the upper carrier 62 and being held therein by the set If but one denture is to be ground, the other denture may be represented by a lead model or cast.

The mark 71 on the table 5 is brought into coincidence with the fixed pointer 66,

A set screw 50' means of the pointer 68, the center line of the lower denture in the ring 43 may be made to coincide vertically with the mark 71. Subsequently, the pointer 68 may be raised, and the center line of the denture in the ring 64 may be made vertically coincident with the mark 71 and the center line of the lower denture.

By means of measurements, by wax impression, or in any other suitable way, the maximum movement of the lower jaw of the patient may be obtained. Then, 'by manipulating the screw 35 through the medium of the hub 26, the nut 37 may be moved toward and away from the axis of rotation of the auxiliary shaft 30. In this way, the throw of the lower jaw, from front to back, may be set off. In a similar way, by rotating the screw 11 through the medium of the head 16, the nut 10 can be shifted with respect to the'center of rotation of the shaft 18, and in this way the lateral throw of the-lowerjaw can be set off.

nut 37 acting as a crank arm whereby movement is imparted to the table 5. Since the posts 2 are connected with the base 1 and the table 5 by means of ball and socket joints, it will be obvious that the table 5 will be capable of having imparted thereto, practically a universal lateral movement, this movement being given to the table by the pitmen 8 and 39, as hereinbefore described.

The spring tongues 57, being adjusted by means of the screws 60, cause the upper denture to cotiperate with the lower denture, with the necessary pressure to secure a grinding of the dentures. By adjusting the set screw 52 in the bar 53, an adjustment in the position of the arm 46 may be secured. The bar 53, and consequently the arm 46, the spring tongues 57 and the ring 64, cannot move upwardly, because the bar 53 is secured by the bracket 44, against vertical movement, by the stud 54 and the nut 55. shown in Fig. 2, the screws 52 and 60'exercising their functions, then the bar 53 abuts against the lug 49 on one of the ears 48.

When the bar 53 is in the position When it is desired to examine the denture in the ring 64, then the bar 53 is swung horizontally away from the lug 49, and the arm 46 may be turned upwardly, the eye 47 of the arm swinging on the pin 45.

The manipulation of this. machine reproduces the movements of the mandible'in all its relations to the maxilla.

The movements of the mandible are reproduced by waxing a thin sheet of metal to the upper teeth and witha soft wax on the under surface of metal and an instrument to hold lower denture firm on ridge the patient is instructed to make both lateral and anterior movements of the mandible, thus the movementsof the mandible are recorded on the soft wax on under surfac 'f'of the metal.

The plates are now placed on the machine in occlusion and fastened. The dentures are separated and the metal plate is placed on upper teeth as was in the mouth; then by adjusting of eccentrics the movements that were produced in the mouth are reproduced by the machine. I

The drive pulley is put into operation either by hand or by belt and moves the ec'-,

centrics, giving facsimile of movements as recorded in the mouth.

The fastenings of the dentures to the machine are so constructed that the dentures may be removed and replaced in the mouth and movements proven. U

The machine can also be used for grinding of a single denture, either full or partial by the making of a lead die of the opposing teeth and placing same in occlusion on machine as described above.

Having thus described the invention,

per and lower denture carriers; means for producing a lateral movement of the lower carrier; mechanism for supporting the up; per carrier for yielding movement in a direction at right angles to the lateral movement of the lower carrier; and means for adjusting said mechanism.

3. In a device of the class described, a

lower denture carrier; means for producing a lateral movement of the lower carrier; an arm; an upper denture carrier cooperating with the lower denture carrier and supportparting lateral movement thereto in difi'erent directions; an upper denture carrier; and means for holding the upper denture carrier in operative relation to the lower denture carrier.

5. In a device of the class described, a support; a lower denture carrier; posts having their respective ends swiveled to the support and the carrier; angularly disposed means assembled with the carrier for imparting lateral movements thereto in different directions; an arm mounted to swing toward and away from the lower carrier; and an upper denture carrier mounted on the arm and cooperating with the lower carrier.

6. In a device of the class described, a lower denture-carrier; means for supporting the carrier for universal lateral movement; a pair of angularly disposed shafts; means for supporting the shafts for rotation; pitmen connected with the carrier; means for connecting the pitmenwith the respective shafts for adjustment toward and away from the axes of rotation of the shafts; an upper denture-carrier cooperating with the lower denture carrier; and means for supporting the upper denture carrier.

In testimony that we claim the foregoing as our own, we have hereto afiixed our signatures in the presence of two witnesses.

HOMER MANNON. v HERMAN M. BROWN.

" .ROBERT G. PERKINS.

Witnesses:

D. DAVID CASHRINE,

H. A. LAMBERT. 

